tkalkirill commented on code in PR #6330:
URL: https://github.com/apache/ignite-3/pull/6330#discussion_r2239651989
##########
modules/low-watermark/src/test/java/org/apache/ignite/internal/lowwatermark/LowWatermarkImplTest.java:
##########
@@ -336,6 +342,36 @@ void
testUpdateAndNotifyNotInvokeFailureManagerWhenGetNodeStoppingException() {
verify(failureManager, never()).process(any());
}
+ @Test
+ void testParallelScheduleUpdates() throws Exception {
+ assertThat(lowWatermarkConfig.updateIntervalMillis().update(300L),
willCompleteSuccessfully());
+
+ assertThat(lowWatermark.startAsync(new ComponentContext()),
willCompleteSuccessfully());
+
+ runRace(
+ () -> lowWatermark.scheduleUpdates(),
+ () -> lowWatermark.scheduleUpdates(),
+ () -> lowWatermark.scheduleUpdates(),
+ () -> lowWatermark.scheduleUpdates()
+ );
+
+ Thread.sleep(1_000);
+
+ verify(lwmChangedListener, atLeast(2)).notify(any());
Review Comment:
Because the interval is 300ms, then after 1 second, regardless of the
platform (well, I suppose so), at least 2 watermark updates will be performed,
in normal systems it should of course be 3, but I don’t want a flaky test.
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